Statistics MCQs

Page No. 40

If in a sampling distribution of X the sample size is 25, what assumption must hold for the sampling distribution of X to be normal ?


a Population distribution is normal


b μ1 = μx


cPopulation distribution is uniform


dσx = σx /√n



For making voters lists in Pakistan we need _______________?


aSimple random sampling


bSystematic sampling


cQuota sampling


dCensus


View Answer Census

Which of the following is impossible in sampling ?


aDestructive tests


b Heterogeneous data


cTo make voters lists


dNone of these


View Answer To make voters lists

A sample estimate is used to describe a characteristic of a_____________?


aSample


bData


cPopulation


dNone


View Answer Sample

The sampling error is the_____________?


aSame as the standard error of the mean


b Difference between the value of the sample mean and the value of the population mean


cError caused by selecting a bad sample


dStandard deviation multiplied by the sample size



A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is___________?


a.Approximately normal because is always approximately normally distributed


b Approximately normal because the sample size is large in comparsion to the population size


cApproximately normal because of the central limit theorem


dNormal if the population is normally distributed



Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?


a Approximately normal because the sample size is small relative to the population size


bApproximately normal because of the central limit theorem


c Exactly


d None of these alternatives is correct



The difference between statistics and parameter is called:______________?


aBias


bStandard


cSampling error


dboth (a) and (b)


View Answer Sampling error

In w.o.r 2σx=_____________________?


a26/√n√N – n/N – 1


bσ/√n√N – n/N – 1


c26/√n N – n/N – 1


d 26/√n



Standard deviation of the sampling distribution of a statistics is called_____________?


a Serious error


bDispersion


cStandard error


dDifference


View Answer Standard error

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